Abstract:

There exist the problems of high rate of loss and great percentage of trash content for tangential-axial combine harvester.In order to analyze the causes for low cleaning performance，airflow field distribution in cleaning room of tangential-axial combine harvester was simulated，with the CFD simulation software to analyze the  airflow in the air passage of the cleaning room.The results showed that the cleaning room airflow distribution was symmetrical in the screen surface width direction；the airflow velocity decreased in the height direction gradually；the airflow velocity at the forepart was low in the screen length direction；the velocity reached the maximum near the middle of the screen.Airflow field in cleaning room was also measured to verify the accuracy of the simulation experiment.

Key words: tangential-axial, cleaning room, airflow distribution, CFD simulation